Fix scratchpad related crashes

* Was crashing when a view was moved to the scratchpad (prev focus had
no parent).
* Was crashing when a hidden scratchpad view unmaps because it has no
workspace.

1 files changed, 4 insertions, 1 deletions

diff --git a/sway/input/seat.c b/sway/input/seat.c
index 502ed5ac..92d9d7ec 100644
--- a/sway/input/seat.c
+++ b/sway/input/seat.c
@@ -618,7 +618,10 @@ void seat_set_focus_warp(struct sway_seat *seat, struct sway_node *node,
         if (last_focus) {
                 seat_send_unfocus(last_focus, seat);
                 node_set_dirty(last_focus);
-                node_set_dirty(node_get_parent(last_focus));
+                struct sway_node *parent = node_get_parent(last_focus);
+                if (parent) {
+                        node_set_dirty(parent);
+                }
         }
 
         // Put the container parents on the focus stack, then the workspace, then